Notice in the red-circled areas that there are buttons. First there is a promote button. This button seems to move a Google search result up, meaning, it is quite good for websites that are more relevant to a search term but are ranked lower than other websites due to some unknown reasons.
Then there is a remove button. I believe this button is to hide the search result from my view. I can use this to hide a link that I have already visited, so that I can concentrate on other Google search results.
Then the comment button. A textarea will drop down when I click on it. And apparently, I can type comments and send them!
You will need to have a google account in order to view this feature when searching for stuff on google. Hopefully, this feature will help me. I mean, my Bleach page that has the latest episodes do not even appear on popular keywords like "Watch Bleach Episodes". I know, it is hard to get to the top and all, but I was once there. And the current top results for "Watch Bleach Episodes" are sites with a one-month-old update. I mean, they are 10+ episodes behind... Oh well.